zarkam21:
?
Vocaloid:
x-component = length of vector * cos(theta)
zarkam21:
C
Vocaloid:
good
Vocaloid:
you just need to figure out how many decimal places they moved to get from 0.0034 to 3.4, then write that as the appropriate exponent
zarkam21:
3?
Vocaloid:
good, so 0.0034 = 3.4* 10^-3
Vocaloid:
any potential ideas? as a hint the statue is way high up, sitting still, then falls
zarkam21:
um c or d
Vocaloid:
it's sitting still at the beginning so no KE at the beginning (only GPE) so C
Vocaloid:
ke = (1/2)mv^2 as unusual
zarkam21:
B
Vocaloid:
good
Vocaloid:
PE = mgh
zarkam21:
A
Vocaloid:
good
Vocaloid:
work = Fd
zarkam21:
C
Vocaloid:
good
Vocaloid:
output force/input force = mechanical advantage
zarkam21:
A
Vocaloid:
good
Vocaloid:
displacement = velocity * time
zarkam21:
B
Vocaloid:
good
zarkam21:
D
Vocaloid:
good
zarkam21:
A
Vocaloid:
that's the y-direction not the x- direction as a hint - are there any forces acting in the x direction ? keep in mind we are ignoring air resistance
zarkam21:
so 0
Vocaloid:
good
Vocaloid:
acceleration = delta v/delta t = ?
zarkam21:
B
Vocaloid:
initial velocity = 28 final velocity = 0 so change in velocity / time = 28/2.1 = ?
zarkam21:
oh okay d
Vocaloid:
gud
zarkam21:
i got that before but the negative sign threw me
zarkam21:
off*
zarkam21:
D
Vocaloid:
i'mreallybadatthese but since they're moving in the same direction I believe the velocities would actually add up
Vocaloid:
in that brainly problem the man is walking west, so the velocities subtract
zarkam21:
C
Vocaloid:
good
zarkam21:
C?
Vocaloid:
yup
Vocaloid:
F = mv^2 / r
zarkam21:
D
Vocaloid:
good
Vocaloid:
good, a
Vocaloid:
friction force = μN
zarkam21:
D
Vocaloid:
N = normal force = mg (in this case)
zarkam21:
B
Vocaloid:
friction force = (0.3)(67)(9.8) = ?
zarkam21:
Oh C
Vocaloid:
yes
zarkam21:
D
Vocaloid:
well done
zarkam21:
D
Vocaloid:
first off - what's the change in velocity?
zarkam21:
4
Vocaloid:
good, but to be more specific, 4 m/s slowing down going north, which means the impulse must have been to the south so A
zarkam21:
A
Vocaloid:
good
zarkam21:
C
Vocaloid:
good
zarkam21:
C
Vocaloid:
I think that's right {either C or A but I'm leaning towards C} :S
zarkam21:
thank you so much !!!!!
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